Year	% of adults
2004	24.6
2005	24.6
2006	20.3
2007	22.6
2008	29.7
2009	33.9
2010	31.4
2011	35.9
2012	34.7
2013	36.5
2014	39
2015	43.2
2016	45.2
2017	49.8
2018	52.9
2019	55